They should play in the round for every stadium. Look at the numbers U2 pulled in.
At least 90,000 attendance for every date.
They would not sell those out in the states, no way. They'd be playing to half-empty venues.
Exactly. Also, I think doing an end stadium show allows them to use big screens for the people far away. I can only think of Jerry's world as a stadium that has the huge screen in the middle so you'd effectively be able to see everything if the concert was in the round.
Metlife stadium has big screens, but they are at the four corners. If Metallica played in the round, people would be watching the corner of the stadium, not the center if they were too far away. Well, that's my guess, never seen a concert in the round before personally.
...and definitely not as big as U2. They hit a much larger audience.